A&D 2 Plus - Manual

Introduction 3 Multilevel diving is where theMonitor 3 Air excels. Bycontinuously calculating thenitrogen absorption/releaseof all the compartments, thecomputer updates theamount of no-decompressiontime (NDT) you have left. Asyou ascend to shallowerdepths, the computer creditsyou with more allowable...

4 Features of the Monitor 3 Air The Monitor 3 Air is made up of two compact units: thecomputer/display unit which is usually worn on the wrist,and the high pressure (HP) transmitter which is screwedinto the regulator first-stage HP port. THE COMPUTER SCREEN The Monitor 3 Air has a large liquid cryst...

Introduction 5 Monitor 3 Air display zones and contact letter designations

6 THE TRANSMITTER The compact transmitter module screws into a standard 7 / 16 " HP port. The transmitter automatically activates when it senses pressure from the cylinder. Once activated, itsends pressure information via a low frequency radio waveto the wrist unit. One of the unique features of...

In this section: ☛ Attaching the Transmitter to theRegulator ☛ Pairing the Wrist Unit with theTransmitter ☛ Using the Monitor 3 Air Withoutthe Transmitter ☛ Checking battery power

Section 1: Preparation 8 Attaching the Transmitter to YourRegulator Upon purchasing the Monitor 3 Air have your AuthorizedU.S. Divers Dealer attach the transmitter to your first-stageregulator. If this is not possible, follow the simple stepslisted below to do it yourself: Thread the transmitter int...

Section 1: Preparation 9 CAUTION: DO NOT use the transmitter as a carryinghandle. Doing so may damage the transmitterrequiring its replacement. If the first-stage isattached to a cylinder, make sure to secure thecylinder so it doesn’t fall over and damage thetransmitter (or regulator). A transmitter...

Section 1: Preparation 12 Once paired, the Monitor 3 Air will always display the tankpressure of the cylinder to which the transmitter isconnected, whenever it is in range. Note: The pairing procedure only needs to performed once, before the first use. After that, the only time you need to perform t...

Section 2: Diving with the Monitor 3 Air 14 Preparation for the Dive Note: The following preparation instructions assume that the transmitter is installed correctly into your first-stage regulator (see page 8) and that it is paired with the Monitor 3 Air computer (see page 9). WARNING: If the Monito...

Section 2: Diving with the Monitor 3 Air 16 Current Depth Current depth is displayed in one-foot increments down to amaximum of 330 feet. When the depth is two feet or less,the depth display is replaced with three dashes. Note: Depth measurement is based on freshwater. When diving is salt water, the...

Section 2: Diving with the Monitor 3 Air 17 Dive Time Dive time, which is displayed in minutes, is the amountof time spent below a depth of 4 feet. While the dive timeis running, the colon to the right of the number flashesin one-second intervals. Maximum dive time displayed is199 minutes. Note: If ...

Section 2: Diving with the Monitor 3 Air 18 Ascent Rate The optimal ascent rate varies between 23 and 67 ft/min.depending on the depth. Ascent rate is displayed as apercentage of the allowable ascent rate (rounded to thenearest 10 %). For example, if the allowable ascent rate atthe current depth is ...

Section 2: Diving with the Monitor 3 Air 22 WARNING: Never allow the ATR to go below threeminutes. If the ATR goes below three minutes thereis a danger of insufficient air supply for the ascentas well as an increased risk of decompressionsickness and serious injury or death may result. WARNING: Corr...

Section 2: Diving with the Monitor 3 Air 24 Total Ascent Time Total Ascent Time is the addition of all the decompressionstop times plus the amount of time it takes to ascend fromthe current depth to the first decompression stop. Note: Total ascent time is calculated with an optimal ascent rate of 10...

Section 2: Diving with the Monitor 3 Air 25 Functions at the Surface Upon surfacing After reaching the surface, the Monitor 3 automaticallyswitches into wait-mode for five minutes. This is theamount of time necessary to recognize the end of thedive. The five minute delay allows you to come to thesur...

Section 2: Diving with the Monitor 3 Air 29 Diving at Altitude The Monitor 3 Air measures the atmospheric pressureeven while in Sleep Mode. If the computer detects a higheraltitude, it automatically switches on and displays theadaptation time. This is the time after which your body isconsidered desa...

Section 2: Diving with the Monitor 3 Air 30 Even the smallest differences in the pressure sensors cancause two computers at the same altitude to displaydifferent altitude sectors. (Notice how the altitude sectorsoverlap in the illustration.) These differences are notmeaningful and do not interfere w...

Section 2: Diving with the Monitor 3 Air 32 Lost transmission If the computer does notreceive data from the trans-mitter, the antenna symbol isdisplayed, accompanied bytwo beeps. If this occursfrequently, check the positionof the transmitter or com-puter. If situation persists formore than 40 second...

Section 2: Diving with the Monitor 3 Air 33 Fast ascent Reduce your ascent rate (seepage 18 for more details onascent rate) Air Time Remaining = 0 The air supply may beinsufficient to safely reachthe surface. Start yourascent immediately. Alarms Alarms are communicated to you by symbols, letters, or...

Section 3: Memory Mode 36 Overview The Monitor 3 Air wrist unit is able to display the details ofthe last 19 dives. Any dive that lasts two minutes or longeris entered into memory. After the memory is filled with all19 dives, the oldest dive is deleted for each new diveentered. All the dive informat...

Section 3: Memory Mode 38 Activation STEP 1 From Ready Mode or Surface Mode, touch contacts A & C. The computer will emit one beepand the Memory Mode icon will appear in themode zone. If activating from Surface Mode, thecurrent surface interval also appears. STEP 2 Touch Contacts A & D to co...

Section 3: Memory Mode 39 Scrolling through Logged Dives To scroll back through the memory (towards the oldestdive), touch contacts A & C. To scroll forward through thememory (towards the most recent dive), touch contactsA & B. Scroll back throughlogged dives Note: The absence of a previous ...

Section 4: Pre-Dive Planning Mode 42 Overview The Monitor 3 Air has a built-in dive planner that allowsyou to plan both no-stop dives and decompression dives.The planner takes into account the temperature of the mostrecent dive and altitude. WARNING: Planned decompression dives violate theresponsibl...

Section 4: Pre-Dive Planning Mode 44 Activation from Surface Mode STEP 1 From Surface Mode, touch contacts A & B. The computer will emit one beep and the Dive PlanIcon will appear in the mode zone. STEP 2 Touch contacts A & D to confirm the selection.The words "Add" and "Int"...

Section 4: Pre-Dive Planning Mode 46 Planning a Decompression Dive Before planning a decompression dive, reread theimport warning at the beginning of this section. STEP 1 When the Monitor 3 Air scrolls to the desireddepth, touch contacts A & D. The word “Add”appears in the depth zone, the flashi...

Section 5: Care & Maintenance 51 Care After the Dive CAUTION: If the Monitor 3 Air transmitter is notattached to a first-stage regulator while soaking(explained below), make sure that water is notallowed to enter the high pressure inlet. Waterentering the transmitter may cause damage to theinter...

Section 5: Care & Maintenance 52 Operating Temperature The Monitor 3 Air operates normally between 12 o F to 122 o F (-10 o C to 50 o C). You may notice the liquid crystal display (LCD) becoming sluggish at extremely low temperatures.This is normal and will not affect the computer’s accuracy. It...

Section 6: Reference 54 Technical Specifications Operational Performance Depth Range: ................... 0-330 feet Time Measurement: .......... 0-199 min.; Quartz timing Air Pressure Range: .......... 3625 psi Temperature Range: ......... 1 4 o F to 122 o F Display: ............................ Hi...

Section 6: Reference 55 ZH-L8 ADT Calculation Model The Monitor 3 Air uses a new calculation model known asthe ZH-L8 ADT. This model uses eight compartments or"tissue" groups with half-times ranging from 5 to 640minutes. This calculation model is based on the mostcurrent research conducted b...

Section 6: Reference 56 time will also assist those local areas of impaired circulationto desaturate with less risk of decompression sickness. The calculation of microbubbles results in altered ascentinstructions. If microbubbles are assumed to be presentbased on the data used by the Monitor 3 Air, ...